Helge Weman, professor in nano-electronics & nano-photonics
Department of Electronics & Telecommunications
Since I was appointed as a professor at NTNU in 2005 my research has focused on synthesis and characterization of semiconductor nanowires for use in energy efficient light emitters (LEDs) and solar cells. A strong focus is being made on heterostructured III-V semiconductor nanowires grown in the Molecular Beam Epitaxy lab. Fabrication of nanowire devices is being explored by electron beam lithography, nanoimprinting and focused ion beam techniques using NTNU NanoLab. Optoelectronic characterization of single nanowires using techniques such as low temperature photoluminescence and photocurrent is done in the Nanophotonics lab. In 2012 I co-founded the start-up company CrayoNano AS who will develop flexible nanowire based solar cells and LEDs by growing the nanowires on graphene. See how this is done in this animated YouTube video (more than 82 000 views)
June-July 2014. I am giving invited talks in Seoul, Dresden and Aberdeen this summer.
April 11, 2014. NTNU and IBM makes press releases related to our publication in Nature Communications. See Nature's on-line metrics attention here.
April 10, 2014. "Inducing a direct-to-pseudodirect bandgap transition in wurtzite GaAs nanowires with uniaxial stress" is published in Nature Communications.
Jan. 27, 2014. "Position-Controlled Uniform GaAs Nanowires on Silicon using Nanoimprint Lithography" is published in Nano Letters.
June 11, 2013. An interview of me is published in Science Daily: Graphene and Semiconductor Technology Together: Smaller, Cheaper, Better.
Nov. 6, 2012. "A Story Told by a Single Nanowire: Optical Properties of Wurtzite GaAs" is published in Nano Letters.
Sept. 10, 2012. NTNU makes a press release related to our publication in Nano Letters (below) and start-up company CrayoNano.
Aug 13, 2012. "Vertically Aligned GaAs Nanowires on Graphite and Few-Layer Graphene: Generic Model and Epitaxial Growth" is published in Nano Letters.
Editor: Helge Weman, Last updated: June 22, 2014